CN112545818A

CN112545818A - Lifting device for surgical patient

Info

Publication number: CN112545818A
Application number: CN202011379538.XA
Authority: CN
Inventors: 莫娟; 陈顺珍; 莫超艳
Original assignee: Yulin Red Cross Hospital
Current assignee: Yulin Red Cross Hospital
Priority date: 2020-11-30
Filing date: 2020-11-30
Publication date: 2021-03-26

Abstract

The invention discloses a lifting device for a surgical patient, which comprises a base, a support frame arranged on the base and a surgical platform supported by the support frame, wherein the surgical platform comprises a seat plate and a back plate, the seat plate is fixedly and horizontally arranged on the support frame, leg placing grooves are respectively arranged above two sides of the seat plate, the bottoms of the leg placing grooves are connected with lifting rods, the leg placing grooves can lift along with the lifting rods, the back plate, the seat plate and the leg placing grooves are respectively used for leaning against the back, placing the hip and placing the shank when the patient adopts a lithotomy position, the lower parts of the lifting rods are in a rack shape, and teeth of the racks are arranged along the length direction of the lifting rods; the supporting frame is provided with a motor, and a gear rack is arranged between a main shaft of the motor and a rack of the lifting rod for transmission. The lifting of the opposite leg slots is controlled by using the motor, so that the lifting device is more convenient and labor-saving compared with the conventional manual adjustment.

Description

Lifting device for surgical patient

Technical Field

The invention relates to the field of medical instruments, in particular to a surgical patient lifting device.

Background

The lithotomy position is used as a mode for surgical position taking, and is characterized in that a patient lies on the back, two legs are placed on a leg frame, the hip is moved to the bedside, the perineum can be exposed to the maximum extent, and the lithotomy position is multipurpose for anorectal surgery and gynecological surgery. The existing equipment for the lithotomy position operation is mainly an operating table or an operating chair with two leg frames, wherein each leg frame comprises a leg placing groove for placing a shank and a lifting rod for lifting the leg placing groove, the position of the leg placing groove is adjusted by manually adjusting the lifting rod below the leg placing groove during use, and the weight of the lower limb is mainly borne by the leg placing groove in the adjustment process, so that great labor is needed, and the adjustment is inconvenient.

Disclosure of Invention

The invention aims to provide a surgical patient lifting device which can conveniently and labor-effectively adjust the leg height of a patient in lithotomy or examination.

In order to solve the technical problems, the invention adopts the following technical scheme:

a lifting device for a surgical patient comprises a base, a support frame arranged on the base and a surgical platform supported by the support frame, wherein the surgical platform comprises a seat plate and a back plate, the seat plate is fixedly and horizontally placed on the support frame, leg placing grooves are respectively arranged above two sides of the seat plate, the bottoms of the leg placing grooves are connected with lifting rods, the leg placing grooves can lift along with the lifting rods, the back plate, the seat plate and the leg placing grooves are respectively used for leaning against the back, placing the hip and placing the lower leg when the patient adopts a lithotomy position, the lower part of the lifting rods is in a rack shape, and teeth of the rack are arranged along the length direction of the lifting rods; the supporting frame is provided with a motor, and a gear rack is arranged between a main shaft of the motor and a rack of the lifting rod for transmission.

As a further improvement of the above technical solution:

a speed reduction transmission mechanism is arranged between the main shaft of the motor and the rack of the lifting rod; the speed reduction transmission mechanism comprises a first pinion, a first rotating shaft, a first gearwheel, a second pinion, a second rotating shaft, a second gearwheel and two driving gears, the first pinion is fixed on a main shaft of the motor, the first gearwheel and the second pinion are fixed on the first rotating shaft, the two driving gears are respectively fixed at two ends of the second rotating shaft, the second gearwheel is fixed on the second rotating shaft and is positioned between the two driving gears, the gear ratios of the first pinion and the first gearwheel meshing transmission and the gear ratios of the first pinion and the first gearwheel meshing transmission are less than 1, the gear ratios of the second pinion and the second gearwheel meshing transmission and the gear ratios of the second pinion and the second gearwheel meshing transmission are less than 1, and the two driving gears are respectively directly meshed with racks of the. The speed reduction transmission mechanism carries out secondary speed reduction transmission on the output of the motor, can reduce the rotational inertia, increase the torque and reduce the rotating speed, thereby slowly and stably adjusting the lifting of the lifting rod and being beneficial to the adjustment of the leg height of a patient.

The speed reduction transmission mechanism also comprises a box body and four bearing seats; two parallel partition plates are arranged in the box body so as to partition the box body into a middle large cavity and two small cavities at two sides, the motor is arranged in the large cavity, two ends of the first rotating shaft and the second rotating shaft respectively penetrate through the two partition plates, the two driving gears are respectively positioned in the two small cavities, and the lifting rod meshed with the driving gears penetrates out of the upper end of the box body from the small cavities; the four bearing seats are arranged on the through holes of the partition plate and used for bearing the first rotating shaft or the second rotating shaft. The motor and the speed reduction transmission mechanism are connected by the box body, so that the influence of external pollution on the power assembly can be avoided.

A guide rail is arranged on the lifting path of the lifting rod; the lower part of the lifting rod comprises a sliding part and a rack part, the sliding part is in a long strip shape, open slots are formed in the two sides of the sliding part along the length direction, the rack part is provided with teeth along the length direction of the sliding part, and the width of the rack part is smaller than that of the sliding part; the guide rail is fixed at other parts outside the lifting rod, the guide rail is a T-shaped groove which is sleeved with the sliding part and the rack part in a matching mode, the two inner walls of the T-shaped groove are provided with convex strips which are embedded into the open grooves in a matching mode, and the lifting rod can slide along the groove direction of the T-shaped groove and expose teeth of the rack part when being sleeved in the T-shaped groove. Furthermore, the sliding part is a square strip; the open slot is an arc slot. The guide rail of above-mentioned structure can avoid the lifter to drop from the slide rail when sliding, does benefit to the steady lift of lifter.

The back plate is hinged with the seat plate, the back plate can rotate around the hinged joint to adjust an included angle between the back plate and the seat plate, and an angle adjusting mechanism is arranged below the back plate; the angle adjusting mechanism comprises a connecting seat and an electric hydraulic push rod, the electric hydraulic push rod is installed on the base, the top end of a telescopic rod of the electric hydraulic push rod is hinged to the lower end of the connecting seat, and the upper end of the connecting seat is fixed on the bottom surface of the back plate. The height and the angle of the back plate are adjusted by using an electric hydraulic rod, so that the back plate is more convenient and labor-saving. Furthermore, an operation panel is arranged on one side of the seat plate, and a switch for controlling the motor and the electric hydraulic push rod is arranged on the operation panel. Furthermore, the bottom of one end of the seat plate close to the back plate is fixedly provided with a rotation stopping plate which extends to the lower part of the back plate and is used for preventing the back plate from overturning downwards.

The bottom of the leg placing groove is fixedly supported with an adjusting rod, two sleeves are coaxially sleeved outside the adjusting rod, one sleeve is fixedly connected to the top of the lifting rod, the other sleeve is fixedly connected to the side edge of the seat plate or the supporting frame, the side walls of the two sleeves are in threaded connection with adjusting screws, and the adjusting screws are used for fastening the adjusting rod in the sleeves after being screwed down. Furthermore, the lower part of the lifting rod is perpendicular to the seat plate, and the upper part of the lifting rod is bent towards the adjusting rod.

The two sides of the back plate are also provided with a long-strip-shaped hand-restraining plate for placing the upper limb of the patient, the hand-restraining plate is provided with a sliding groove along the length direction, and a hand-restraining mechanism is slidably arranged on the sliding groove; the hand-restraining mechanism comprises two clamping claws; the clamping claw comprises a clamping plate, a connecting plate and an extrusion plate; the clamping plate is an arc-shaped panel, the extrusion plate is fixedly connected to the lower edge of the clamping plate, an included angle is formed between the clamping plate and the extrusion plate, and the concave surface of the clamping plate faces back to the included angle; the connecting plates are laterally protruded at the connecting parts of the clamping plates and the extrusion plates, and the two connecting plates are hinged by adopting a spring hinge structure, so that the two clamping plates are always in a state of being clamped oppositely; the spout is T type groove, presss from both sides in the stripper plate of hand claw locates the spout, and the grip block is in the spout top, and along fixedly connected with stripper plate down, the parcel has the soft coating of being made by soft material on the stripper plate, and the inner wall of spout is extruded to soft coating when two grip block centre gripping upper limbs. Furthermore, the clamping plates of the two clamping claws are connected through a magic tape.

The hand-restraining plate is connected with the back plate through a connecting mechanism; the connecting mechanism comprises two connecting rods which protrude from the side edge of the back plate and one end of the hand restraining plate respectively, one end of one connecting rod is provided with a groove with two through ends, a pivot is fixedly clamped between two inner walls of the groove, a friction strip is arranged around the circumference of the pivot and fixed along the axial direction of the pivot, the end part of the other connecting rod can be inserted into the groove, a through hole is formed in the insertion end, the pivot penetrates through the through hole, a friction layer made of a soft material is fixed on the inner wall of the through hole, and the friction strip and the friction layer are extruded mutually.

The invention has the beneficial effects that: the opposite leg slots are lifted through gear and rack transmission by using the motor, and compared with the conventional manual adjustment, the lifting device is more convenient and labor-saving.

Drawings

Fig. 1 is a schematic view of the overall structure of the preferred embodiment of the present invention.

Fig. 2 is a schematic connection diagram of the back plate and the hand restraining plate in the embodiment of fig. 1.

Fig. 3 is a schematic structural diagram of the hand restraint mechanism in the embodiment of fig. 1.

Fig. 4 is a schematic structural view of the gripper jaw in fig. 3.

Fig. 5 and 6 are a perspective view and an exploded view, respectively, of the coupling mechanism of fig. 2.

Fig. 7 is a schematic structural diagram of a transmission mechanism in the embodiment of fig. 1.

Fig. 8 is a schematic structural view of the lifting rod and the guide rail in the embodiment of fig. 1.

Fig. 9 is a schematic structural view of an adjusting lever in the embodiment of fig. 1.

The reference numbers in the figures are: 1. a base; 2. a support frame; 3. a seat plate; 4. a back plate; 5. a leg placing groove; 6. a lifting rod; 61. a sliding part; 62. a rack portion; 63. an open slot; 7. a motor; 8. a reduction transmission mechanism; 81. a first pinion gear; 82. a first rotating shaft; 83. a first bull gear; 84. a second pinion gear; 85. a second rotating shaft; 86. a second bull gear; 87. a drive gear; 88. a box body; 89. a bearing seat; 810. a partition plate; 811. a synchronous belt; 9. a guide rail; 91. a convex strip; 10. a connecting seat; 11. an electric hydraulic push rod; 12. an operation panel; 13. a rotation stopping plate; 14. adjusting a rod; 15. a sleeve; 16. an adjusting screw; 17. a limiting ring; 18. pressing a switch; 19. a buffer ring; 20. a hand-binding plate; 21. a chute; 22. a hand-binding mechanism; 221. a clamping plate; 222. a connecting plate; 223. a pressing plate; 224. an extrusion stem; 225. a soft coating layer; 226. fixing belts; 23. a connecting mechanism; 231. a connecting rod; 232. a groove; 233. a pivot; 234. rubbing the strips; 235. and (4) a friction layer.

Detailed Description

The present invention will now be described with reference to the accompanying drawings, wherein the specific embodiments described herein are merely illustrative and explanatory of the invention and are not restrictive thereof.

Referring to fig. 1, the surgical patient lifting device of the present embodiment includes a base 1, a support frame 2 disposed on the base 1, and a surgical platform supported by the support frame 2. The operation platform comprises a seat plate 3 and a back plate 4, and the seat plate 3 is fixed and horizontally placed on the support frame 2. A leg placing groove 5 is respectively arranged above the two sides of the seat plate 3, the bottom of the leg placing groove 5 is connected with a lifting rod 6, and the leg placing groove 5 can lift along with the lifting rod 6. The back plate 4, the seat plate 3 and the leg placing groove 5 are respectively used for leaning against the back, placing the hip and placing the lower leg when the patient adopts the lithotomy position. The lower part of the lifting rod 6 is in a rack shape, a motor is arranged on the support frame 2, and a gear rack transmission is arranged between a main shaft of the motor and a rack of the lifting rod 6.

The back plate 4 is hinged with the seat plate 3, and the back plate 4 can rotate around a hinged joint to adjust the included angle between the back plate and the seat plate 3. The bottom of one end of the seat plate 3 close to the back plate 4 is fixed with a rotation stopping plate 13, and the rotation stopping plate 13 extends to the lower part of the back plate 4. An angle adjusting mechanism is arranged below the back plate 4. The angle adjusting mechanism comprises a connecting seat 10 and an electric hydraulic push rod 11. The connecting seat 10 is triangular. The electric hydraulic push rod 11 is arranged on the base 1, and the top end of a telescopic rod of the electric hydraulic push rod 11 is hinged with the lower end of the connecting seat 10. The upper end of the connecting seat 10 is fixed on the bottom surface of the back plate 4.

An operation board 12 is arranged on one side of the seat board 3, and a switch for controlling the motor and the electric hydraulic push rod 11 is arranged on the operation board 12. The switch is used for controlling the starting, stopping, positive rotation and reverse rotation of the motor on the support frame 2 and the motor of the electric hydraulic push rod 11 so as to achieve the purpose of controlling the lifting of the lifting rod 6 and the expansion and contraction of the telescopic rod of the electric hydraulic push rod 11. The motor on the support frame 2 can adopt a stepping motor, and has excellent control effect.

Referring to fig. 7, a speed reduction transmission mechanism 8 is arranged between the main shaft of the motor 7 on the support frame 2 and the rack of the lifting rod 6. The reduction gear mechanism 8 includes a first pinion 81, a first rotation shaft 82, a first large gear 83, a second pinion 84, a second rotation shaft 85, a second large gear 86, and two drive gears 87. The first pinion 81 is fixed to the main shaft of the motor 7. The first large gear 83 and the second small gear 84 are fixed to the first rotating shaft 82. Two driving gears 87 are fixed to both ends of the second rotating shaft 85, respectively. The second large gear 86 is fixed on the second rotating shaft 85 and located between the two driving gears 87. The first small gear 81 and the first large gear 83 are in meshing transmission, and the gear ratio of the first small gear and the first large gear is less than 1; the second small gear 84 and the second large gear 86 are in meshing transmission and have a gear ratio of less than 1. The two driving gears 87 are directly engaged with the racks of the two lifting rods 6, respectively.

The reduction transmission mechanism 8 further comprises a box body 88 and four bearing seats 89. Two parallel partition plates 810 are provided in the box body 88 to partition the box body 88 into a large cavity in the middle and small cavities on both sides. The motor 7 is mounted in the large cavity. Two ends of the first rotating shaft 82 and the second rotating shaft 85 respectively penetrate through the two partition plates 810, and the two driving gears 87 are respectively positioned in the two small cavities. The lifting rod 6 meshed with the driving gear 87 penetrates out of the upper end of the box body 88 from the small cavity; the four bearing seats 89 are disposed in through holes of the partition 810, and are used for bearing the first rotating shaft 82 or the second rotating shaft 85.

The first small gear 81 and the first big gear 83 are meshed and driven through a synchronous belt 811, and the second small gear 84 and the second big gear 86 are directly meshed; the first pinion 81 and the first gearwheel 83 are arranged on the same side of the main shaft of the motor 7, the second pinion 84 and the second gearwheel 86 are arranged on the same side of the base of the motor 7, and the second rotating shaft 85 penetrates through the middle of the synchronous belt 811. The gear ratio of the first small gear 81 to the first large gear 83 is 1/5-1/8, the gear ratio of the second small gear 84 to the second large gear 86 is 1/2-1/4, and the size of the second small gear 84 is equal to that of the first large gear 83. Because the teeth number of the first small gear 81 and the first big gear 83 is small, the size difference between the two gears is large, and the synchronous belt is used for transmission between the two gears, so that the direct meshing is more favorable for stable and reliable transmission; at this time, the second small gear 84 and the second large gear 86 are at the same side of the base of the motor 7, and the second rotating shaft 85 passes through the middle of the synchronous belt 811, and by adopting the two-stage transmission mode of the layout, the limited space below the seat plate 3 and in the box body 88 is fully utilized, and the layout is more compact and reasonable.

Referring to fig. 8, a guide rail 9 is provided on a lifting path of the lifting lever 6. The lower part of the lifting rod 6 comprises a sliding part 61 and a rack part 62, wherein the sliding part 61 is long-strip-shaped, open grooves 63 are formed in the two sides of the sliding part 61 along the length direction, and the rack part 62 is toothed along the length direction of the sliding part 61 and has a width smaller than that of the sliding part 61; the guide rail 9 is fixed at other parts outside the lifting rod 6, the guide rail 9 is a T-shaped groove which is fittingly sleeved in the sliding part 61 and the rack part 62, two inner walls of the T-shaped groove are provided with convex strips 91 fittingly embedded in the open groove 63, the lifting rod 6 can slide along the groove direction of the T-shaped groove, and the teeth of the rack part 62 are exposed when being sleeved in the T-shaped groove. Specifically, the sliding portion 61 is a square strip; the open groove 63 is an arc-shaped groove.

Referring to fig. 9, an adjusting rod 14 is fixedly supported at the bottom of the leg placing groove 5, two sleeves 15 are coaxially sleeved outside the adjusting rod 14, one sleeve 15 is fixedly connected to the top of the lifting rod 6, the other sleeve 15 is fixedly connected to the side edge of the seat plate 3 or the supporting frame 2, the side walls of the two sleeves 15 are both in threaded connection with an adjusting screw 16, and the adjusting screw 16 is used for fastening the adjusting rod 14 in the sleeve 15 after being screwed down. At this time, the lower portion of the lift lever 6 is perpendicular to the seat plate 3, and the upper portion is bent toward the adjustment lever 14. The adjusting screw 16 of the upper layer is matched with the sleeve 15 and is used for firmly connecting the adjusting rod 14 with the lifting rod 6, so that the lifting of the leg placing groove 5 is promoted. The lower adjusting screw 16 is matched with the sleeve 15, so as to further fasten the adjusting rod 14 on the supporting frame 2 or the seat plate 3 after adjusting the position of the leg placing slot 5, and prevent the patient from sliding down the leg placing slot 5 due to the over-heavy weight.

The lower end of the adjusting rod 14 is provided with a limiting ring 17, and the limiting ring 17 has the size of blocking the sleeve 15; the adjusting rods 14 between the limiting ring 17 and the sleeve 15 close to the limiting ring and between the two sleeves 15 are provided with press switches 18; the push switch 18 serves as a switch for shutting down the motor 7, passes through the lower sleeve 15 after being touched by the sleeve 15, and sends a shut-down command to the motor 7 after being touched. A buffer ring 19 made of soft material (such as rubber) is attached to one side of the limiting ring 17 close to the sleeve 15 and the lower end of the sleeve 15 at the upper layer. The limiting ring 17 is used for preventing the adjusting rod 14 from falling off, in the using process, when the sleeve 15 slides to the position of the press switch 18, the press switch 18 is touched, the press switch 18 is arranged between the limiting ring 17 and the sleeve 15 and between the two sleeves 15, a buffer path with a distance can be provided, and the direct impact of the lower-layer sleeve 15 on the limiting ring 17 and the upper-layer sleeve 15 is avoided.

Referring to fig. 2-4, the back plate 4 is further provided at both sides thereof with long plate-shaped hand-restraining plates 20 for placing the upper limbs of the patient. The hand-binding plate 20 is provided with a sliding groove 21 along the length direction, and the sliding groove 21 is provided with a hand-binding mechanism 22 in a sliding way. The hand restraining mechanism 22 includes two gripper jaws. The clamping jaw includes a clamping plate 221, a connecting plate 222, and a pressing plate 223. The clamping plate 221 is an arc-shaped plate, the pressing plate 223 is fixedly connected to the lower edge of the clamping plate 221, an included angle is formed between the clamping plate 221 and the pressing plate 223, and the concave surface of the clamping plate 221 faces back to the included angle. The connecting plates 222 are protruded from the connecting position of the clamping plates 221 and the pressing plate 223, and the two connecting plates 222 are hinged by adopting a spring hinge structure, so that the two clamping plates 221 are always in a state of being clamped oppositely. The spring hinge is a common structure and will not be described herein. The sliding groove 21 is a T-shaped groove, the pressing plate 223 of the gripper jaw is arranged in the sliding groove 21, and the clamping plate 221 is blocked above the sliding groove 21. A pressing rod 224 is fixedly connected to the lower edge of the pressing plate 223, a soft coating 225 made of a soft material (e.g., rubber) is wrapped on the pressing rod 224, and the soft coating 225 presses the inner wall of the chute 21 when the two holding plates 221 hold the upper limb. The clamping plates 221 of the two clamping claws are connected through a magic tape; specifically, at least one fixing strap 226 is connected to one of the clamping claws, an engaging piece of the hook and loop fastener is arranged at the end of the fixing strap 226, and another engaging piece of the hook and loop fastener is arranged on the other clamping claw. When the upper limb clamp is used for clamping an upper limb, the upper limb can be firmly clamped due to the elastic force of the spring and the effect of the magic tape; and the whole hand-restraining mechanism 22 is prevented from sliding by the extrusion friction of the soft coating 225 on the sliding groove 21 outside the extrusion plate 223 while clamping the upper limb.

Referring to fig. 5 and 6, the hand restraint plate 20 and the back plate 4 are connected by a connection mechanism 23. The connecting mechanism 23 includes two connecting rods 231 protruding from the side of the back plate 4 and one end of the hand-restraining plate 20. One end of one connecting rod 231 is provided with a groove 232 with two through ends, a pivot 233 is fixedly clamped between the two inner walls of the groove 232, a friction strip 234 is circumferentially distributed on the pivot 233, and the friction strip 234 is fixed along the axial direction of the pivot 233. The other connecting rod 231 has an end portion inserted into the groove 232, the insertion end is provided with a through hole, the pivot 233 penetrates through the through hole, a friction layer 235 made of a soft material (such as rubber) is fixed on the inner wall of the through hole, and the friction layer 234 and the friction strip 235 are pressed against each other. When the medical plate is used, the friction strip 235 and the friction layer 234 are mutually extruded, and a certain friction force is generated to retard the rotation of the plate 20 when the plate rotates, so that a large force is needed to push and pull the plate, and the phenomenon that the plate 20 rotates smoothly to cause shaking of a patient in the operation or examination process can be avoided.

The use method of the surgical patient lifting device in the embodiment comprises the following steps:

a patient needing to adopt the lithotomy position for operation or examination lies on the operation platform, hangs the lower leg on the leg placing groove 5, loosens the adjusting screw 16 at the lower part of the adjusting rod 14, starts the motor 7 through the switch on the operation board 12, drives the lifting rod 6 to a proper position after the motor 7 is subjected to speed reduction transmission of the speed reduction transmission mechanism 8, then closes the motor 7, screws the adjusting screw 16 at the lower part of the adjusting rod 14 again, controls the electric hydraulic push rod 11 through the switch on the operation board 12, adjusts the back board 4 to a proper angle, finally places the upper limb on the hand restraining board 20, and clamps the upper limb through the clamping board 221.

Claims

1. The utility model provides an operation patient lifting device, including base (1), locate support frame (2) on base (1) and by the operation platform that support frame (2) supported, operation platform includes seat (3) and backplate (4), seat (3) are fixed to be kept flat on support frame (2), seat (3) both sides top is equipped with one respectively and puts leg groove (5), it is connected with lifter (6) to put leg groove (5) bottom, it can go up and down along with lifter (6) to put leg groove (5), backplate (4), seat (3) and put leg groove (5) and be used for leaning on the back when the patient adopts the lithotomy position respectively, put the buttock and place the shank, its characterized in that: the lower part of the lifting rod (6) is in a rack shape, and teeth of the rack are arranged along the length direction of the lifting rod (6); a motor (7) is installed on the support frame (2), and gear and rack transmission is adopted between a main shaft of the motor (7) and a rack of the lifting rod (6).

2. The surgical patient lifting device of claim 1, wherein: a speed reduction transmission mechanism (8) is arranged between the main shaft of the motor (7) and the rack of the lifting rod (6); the speed reduction transmission mechanism (8) comprises a first small gear (81), a first rotating shaft (82), a first big gear (83), a second small gear (84), a second rotating shaft (85), a second big gear (86) and two driving gears (87), the first pinion (81) is fixed on a main shaft of the motor (7), the first large gear (83) and the second small gear (84) are fixed on the first rotating shaft (82), the two driving gears (87) are respectively fixed at two ends of the second rotating shaft (85), the second large gear (86) is fixed on the second rotating shaft (85) and is positioned between the two driving gears (87), the first small gear (81) and the first large gear (83) are in meshing transmission, the gear ratio of the first small gear and the first large gear is smaller than 1, the second small gear (84) and the second large gear (86) are in meshing transmission, the gear ratio of the second small gear and the second large gear is smaller than 1, and the two driving gears (87) are respectively and directly meshed with racks of the two lifting rods (6).

3. The surgical patient lifting device of claim 2, wherein: the speed reduction transmission mechanism (8) also comprises a box body (88) and four bearing seats (89); two parallel partition plates (810) are arranged in the box body (88), so that the box body (88) is divided into a middle large cavity and two small cavities at two sides, the motor (7) is arranged in the large cavity, two ends of the first rotating shaft (82) and the second rotating shaft (85) respectively penetrate through the two partition plates (810), the two driving gears (87) are respectively positioned in the two small cavities, and the lifting rod (6) meshed with the driving gears (87) penetrates out of the upper end of the box body (88) through the small cavities; the four bearing seats (89) are arranged on the through holes of the partition plate (810) and used for bearing the first rotating shaft (82) or the second rotating shaft (85).

4. The surgical patient lifting device of claim 1, wherein: a guide rail (9) is arranged on the lifting path of the lifting rod (6); the lower part of the lifting rod (6) comprises a sliding part (61) and a rack part (62), the sliding part (61) is long-strip-shaped, open grooves (63) are formed in the two sides of the sliding part along the length direction, and the rack part (62) is toothed along the length direction of the sliding part (61) and is smaller than the width of the sliding part (61); the guide rail (9) is fixed at other parts outside the lifting rod (6), the guide rail (9) is a T-shaped groove which is sleeved with the sliding part (61) and the rack part (62) in a matching mode, convex strips (91) which are embedded into the open grooves (63) in a matching mode are arranged on two inner walls of the T-shaped groove, and the lifting rod (6) can slide along the groove direction of the T-shaped groove and expose teeth of the rack part (62) when being sleeved in the T-shaped groove.

5. The surgical patient lifting device of claim 1, wherein: the back plate (4) is hinged with the seat plate (3), the back plate (4) can rotate around a hinged joint to adjust an included angle between the back plate and the seat plate (3), and an angle adjusting mechanism is arranged below the back plate (4); the angle adjusting mechanism comprises a connecting seat (10) and an electric hydraulic push rod (11), the electric hydraulic push rod (11) is installed on the base (1), the top end of a telescopic rod of the electric hydraulic push rod (11) is hinged to the lower end of the connecting seat (10), and the upper end of the connecting seat (10) is fixed to the bottom surface of the back plate (4).

6. The surgical patient lifting device of claim 5, wherein: the bottom of one end of the seat plate (3) close to the back plate (4) is fixedly provided with a rotation stopping plate (13), and the rotation stopping plate (13) extends to the lower part of the back plate (4).

7. The surgical patient lifting device of claim 1, wherein: put leg groove (5) bottom fixed support and have adjusted pole (14), adjust pole (14) outer coaxial cover have two sleeves (15), one of them sleeve (15) fixed connection in lifter (6) top, another sleeve (15) fixed connection on seat (3) side or support frame (2), the equal threaded connection of lateral wall of two sleeves (15) has adjusting screw (16), adjusting screw (16) are used for screwing up the back and fasten adjusting pole (14) in sleeve (15).

8. The surgical patient lifting device of claim 1, wherein: both sides of the back plate (4) are also provided with a long-strip-shaped hand-restraining plate (20) for placing the upper limbs of the patient, a sliding groove (21) is formed in the hand-restraining plate (20) in a length mode, and a hand-restraining mechanism (22) is slidably arranged on the sliding groove (21); the hand-restraining mechanism (22) comprises two clamping claws; the clamping claw comprises a clamping plate (221), a connecting plate (222) and a squeezing plate (223); the clamping plate (221) is an arc panel, the extrusion plate (223) is fixedly connected to the lower edge of the clamping plate (221), an included angle is formed between the clamping plate (221) and the extrusion plate (223), and the concave surface of the clamping plate (221) faces back to the included angle; the connecting plates (222) are laterally protruded at the connecting parts of the clamping plates (221) and the extrusion plates (223), and the two connecting plates (222) are hinged by adopting a spring hinge structure, so that the two clamping plates (221) are always in a state of being clamped oppositely; the utility model discloses a soft material's production line, including spout (21), clamping claw's stripper plate (223), stripper plate (221) are located spout (21), and stripper plate (223) are blockked in spout (21) top, and stripper plate (223) are followed fixedly connected with stripper rod (224) down, and the parcel has soft coating (225) of being made by soft material on stripper rod (224), and the inner wall of spout (21) is extruded in two stripper plate (221) centre gripping upper limbs in soft coating (225).

9. The surgical patient lifting device of claim 8, wherein: the clamping plates (221) of the two clamping claws are connected through a magic tape.

10. The surgical patient lifting device of claim 1, wherein: the hand-binding plate (20) is connected with the back plate (4) through a connecting mechanism (23); the connecting mechanism (23) comprises two connecting rods (231) protruding from the side edge of the back plate (4) and one end of the hand binding plate (20) respectively, one end of one connecting rod (231) is provided with a groove (232) with two through ends, a pivot (233) is fixedly clamped between two inner walls of the groove (232), a friction strip (234) is arranged around the circumference of the pivot (233), the friction strip (234) is axially fixed along the pivot (233), the end part of the other connecting rod (231) can be inserted into the groove (232), a through hole is formed in the insertion end, the pivot (233) is penetrated in the through hole, a friction layer (235) made of a soft material is fixed on the inner wall of the through hole, and the friction strip (235) and the friction layer (234) are extruded mutually.